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WELL CONCWRATIONS • <br /> Shell-branded Service Station <br /> 3725 South Tracy Boulevard <br /> Tracy, CA <br /> Wic #204-7884-0901 <br /> MTBE MTBE Depth to GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water Elevation Thickness Reading <br /> (ug/L (u/L (u/L (u/L (u/L (u/L (u/L (u/L MSL ft MSL ft m <br /> MW-3A a 01123/2001 <50 NA <0 50 16 <0 50 2 4 NA 19 9829 1045 8784 NA NA <br /> BF-1 02/18/2000 <50000 NA <500 3320 635 4230 122000 148000 NA 829 NA NA NA <br /> BF-1 05/01/2000 1850 NA 240 <2 50 340 150 158000 106000 NA 870 NA NA NA <br /> BF-1 08/03/2000 <5000 NA 160 136 521 259 81100 118000 NA 904 NA NA NA <br /> BF-1 10/30/2000 18300 NA 260 1700 305 3690 30300 64700 NA 886 NA NA NA <br /> BF-1 a 01/23/2001 <20000 NA 390 <200 <200 <200 NA 110000 NA-7 888 NA NA NA <br /> SUMP 11/15/2000 <50 0 NA <0 500 <0 500 <0 504 <0 500 <2 50 NA NA 1025 NA NA NA <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 <br /> TEPH =Total petroleum hydrocarbons as diesel by modified EPA Method 8015 <br /> BTEX=benzene,toluene, ethylbenzene,xylenes by EPA Method 8020 <br /> MTBE=methyl-tertiary-butyl ether <br /> TOC=Top of Casing Elevation <br /> SPH =Separate-Phase Hydrocarbons <br /> GW=Groundwater <br /> DO= Dissolved Oxygen <br /> ug/L=parts per billion <br /> ppm= parts per million <br /> msl = Mean sea level <br /> ft=Feet <br /> <n= Below detection limit <br /> D= Duplicate sample <br /> NA= Not applicable <br /> Page 5 <br />